Memory problem?

[SfVince]

I am currently using planmaker 2018 with a new laptop with 8GB of RAM and am seeing the software crawling on the verge of crashing when using vlookups or index/match formulas. While monitoring RAM usage on the task manager, i can see it is using around 4 gigs. Maybe Windows cap it at 4 and planmaker needs more? 4gig seems that it should be plenty however.
I understand the file is somewhat big but I can see the software at times working okay and then start crawling to a halt (a cell update might take a few seconds!).
Is there any tweak I can do to Windows 10 to prevent this?
Or should I install 2016 instead?
Thank you for your help or suggestions.

Vincent

[sven-l]

Does that happen with every file or just with specific ones? Could you please attach a sample file or send one to forum(at)softmaker.com? Thank you!